Well said man, I agree.
I started collecting comics, the random issues that I liked the art, from DC and Marvel, back in '87. Stopped collecting around 2003.... honestly I never collected the Eternals.
Out of the forthcoming toys, I like Thena's design best. Don't really like the others.
So far from the movie trailers, the Eternals group seems to lack a certain "down to earth / quirky / hybrid family" appeal, which the Avengers had at their core. It's the sort of appeal that makes you sit back, relax and laugh, when people are talking about Tony's dating life, or who can lift Thor's hammer.
Of course, the Eternals don't have to be the same as The Avengers, since it's a different comic series. But having a sort of relatable / near-palpable appeal is what draws you in, as a new fan. And I haven't gotten that vibe from them yet.